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Write data to ports

Wed May 15, 2013 9:09 pm

Write data to ports
Code:

TITLE 
"Write to port D"
list 16f877
include <p16f877.inc>
ORG 0 ;START ADDRESS
GOTO START 
;START OF PROGPAM

ORG 20H
START CALL INITP 
;INITIALISE PORTS
REPEAT MOVLW 
#55H ;SET OUTPUT TO 55H
MOVWF PORTD ;WRITE TO PORT C
GOTO REPEAT 
;REPEAT FOREVER
INITP
MOVLW 0 
;MAKE PORT D OUTPUT
MOVWF TRISD 
;DO IT
RETURN ;RETURN
END




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